Walker, D. R. (1988). Penology for profit: A history of the Texas prison system, 1867 - 1912. Texas A and M southwestern studies.
Cita Chicago Style (17a ed.)Walker, Donald R. "Penology for Profit: A History of the Texas Prison System, 1867 - 1912." Texas A and M Southwestern Studies 1988.
Cita MLA (8a ed.)Walker, Donald R. "Penology for Profit: A History of the Texas Prison System, 1867 - 1912." Texas A and M Southwestern Studies, 1988.
Precaución: Estas citas no son 100% exactas.